Survey on Routing in Data Centers: Insights and Future Directions

Recently, a series of data center network architectures have been proposed. This paper is to interconnect a large number of servers with significant bandwidth requirements. Coupled with these new DCN structures, routing protocols play an important role in exploring the network capacities that can be potentially delivered by the topologies. This paper conducts a survey on the current state of the art of DCN routing techniques. This paper focuses on the insights behind these routing schemes and also points out the open research issues hoping to spark new interests and developments in this field.